JP4238191B2

JP4238191B2 - Side plate connection structure in folding container

Info

Publication number: JP4238191B2
Application number: JP2004250820A
Authority: JP
Inventors: 貴志藪田
Original assignee: Sanko Co Ltd
Current assignee: Sanko Co Ltd
Priority date: 2004-08-30
Filing date: 2004-08-30
Publication date: 2009-03-11
Anticipated expiration: 2024-08-30
Also published as: JP2006062742A

Description

本発明は側板を内側に傾倒することによって折り畳み可能なプラスチック製のコンテナに関するものである。 The present invention relates to a plastic container that can be folded by tilting a side plate inward.

矩形状の底板と、矩形状の上枠と、上部板材と下部板材とを「く」字状に屈折可能に連結した長側板と、短側板とを具備し、底板の相対する長辺に下部板材を夫々内側に傾倒可能に枢着し、上枠の相対する長辺に上部板材を夫々内側に傾倒可能に枢着し、上枠の相対する短辺に短側板を夫々内側に傾倒可能に枢着してなるプラスチック製の折り畳みコンテナは、下記特許文献１，２、またはその他の刊行物に示されている。
特開平１１−３５０３４号公報実用新案登録第２５８９１６６号公報 It has a rectangular bottom plate, a rectangular upper frame, a long side plate in which an upper plate member and a lower plate member are refractably connected in a “<” shape, and a short side plate, and a lower portion on opposite long sides of the bottom plate. Each plate can be pivoted inwardly so that it can be tilted inward, and the upper plate can be tilted inwardly on the opposite long side of the upper frame, and the short side plate can be tilted inward on the opposite short side of the upper frame. A plastic folding container that is pivotally attached is disclosed in the following Patent Documents 1 and 2, or other publications.
JP-A-11-35034 Utility Model Registration No. 2589166

ところで一般にコンテナの内面は、収容物やゴミが引っ掛かったり、嵌り込んだりすることのないように出来るだけ平坦であることが望ましいが、従来の上記折り畳みコンテナでは、底板と側板との連結部や上枠と側板との連結部が内面から見て凹部、或いは隙間（上記特許文献１では，図３および図１８等に示される。）が生じるものであった。即ち、従来の連結部のように両持ち状の連結軸を射出成形金型により一体に成形しようとすると、金型構造により内側面に凹部或いは隙間が生じざるを得ないものであった。 By the way, it is generally desirable that the inner surface of the container be as flat as possible so that the contents and garbage are not caught or inserted into the container. However, in the conventional folding container, the connecting portion between the bottom plate and the side plate When the connecting portion between the frame and the side plate is viewed from the inner surface, a concave portion or a gap (shown in FIG. 3 and FIG. 18 in the above-mentioned Patent Document 1) occurs. That is, when a doubly-supported connecting shaft is formed integrally with an injection mold as in the conventional connecting portion, a recess or a gap must be generated on the inner surface due to the mold structure.

また、連結軸に荷重が掛かる構成であったので、コンテナを多段に積み上げた場合のように大荷重，長時間荷重が掛かると、連結軸が変形し破損するおそれがあった。なお、強度のある金属製軸ピンを挿入することにより側板を連結した構成も知られているが、上記のように凹部或いは隙間が生じるという欠点があるほか、金属製軸ピンを挿入する組み立ての手間が掛かり、また異種材料が混在することで廃棄時における分別に手間が掛かるという問題があった。 In addition, since the load is applied to the connecting shaft, the connecting shaft may be deformed and damaged when a heavy load or a long time load is applied as in the case where the containers are stacked in multiple stages. In addition, although the structure which connected the side plate by inserting a strong metal shaft pin is also known, in addition to the disadvantage that a recess or a gap occurs as described above, the assembly of inserting the metal shaft pin There is a problem in that it takes time and is troublesome to separate at the time of disposal due to the mixing of different materials.

また、連結部を可撓性の肉薄にして一体に成形するものも知られているが、肉薄とすることで強度が不足する欠点がある。 In addition, there are known ones in which the connecting portion is made flexible and thin and is integrally formed, but there is a drawback that the strength is insufficient by making the connecting portion thin.

そこで本発明の折り畳みコンテナは、プラスチックの射出成形金型による成形および製作を容易にするとともに、組立状態にて内面がより平坦になるようにし折り畳みコンテナの使い勝手を向上しようとするものである。 Therefore, the folding container of the present invention is intended to facilitate the molding and production by a plastic injection mold and improve the usability of the folding container by making the inner surface flatter in the assembled state.

そのために請求項１に記載した折り畳みコンテナの発明は、底板と該底板に重ね合わされて折り畳み状態となる側板との連結構造において、前記底板の外周縁に形成された囲壁には、上方膨部と該上方膨部の一側に形成されているとともに前記囲壁から離間している突出部分とからなる係合部と、両側壁に軸受孔が開設された前記上方膨部とは別の上方膨部が形成されており、また、前記側板の下辺縁には、前記底板に形成された前記係合部に対応して、切込空間が形成されているとともに、該切込空間を構成する側壁の一側には、内向鉤状部が形成されており、更に、前記側板の下辺縁には、前記底板に形成された別の上方膨部に対応して、切込空間が形成されているとともに、該切込空間を構成する両側壁には、支軸が形成されており、前記底板と前記側板とを連結する際には、水平状態の前記側板を、前記底板に接近させて、前記側板の切込空間を構成する両側壁に形成された前記支軸を、前記底板の軸受孔に、前記支軸を弾性変形させながら嵌入し、また、前記側板に形成された切込空間を構成する側壁の一側に形成された前記内向鉤状部を、前記底板の囲壁と前記係合部の突出部分との狭小間隔を通過させることにより、前記底板と前記側板とを連結するように構成されており、前記側板が水平状態においては、前記底板の軸受孔に、前記側板の支軸が遊嵌されていることにより、前記側板と前記底板との係合が維持され、また、前記側壁が起立平状態においては、前記底板に形成された前記係合部の突出部分と前記側板に形成された前記内向鉤状部とが係合することにより、前記側板と前記底板との係合が維持されるように構成したものである。 Therefore, the invention of the folding container described in claim 1 is a connecting structure of a bottom plate and a side plate that is overlapped with the bottom plate and is in a folded state, and the surrounding wall formed on the outer peripheral edge of the bottom plate has an upper swelling portion. An engaging portion formed on one side of the upper bulging portion and having a protruding portion spaced from the surrounding wall, and an upper bulging portion different from the upper bulging portion in which bearing holes are formed on both side walls. A cut space is formed in the lower edge of the side plate corresponding to the engaging portion formed in the bottom plate, and a side wall constituting the cut space is formed. An inwardly saddle-shaped portion is formed on one side, and further, a notch space is formed on the lower edge of the side plate corresponding to another upper bulge portion formed on the bottom plate. In addition, support shafts are formed on both side walls constituting the cut space, When connecting the bottom plate and the side plate, the side plate in a horizontal state is brought close to the bottom plate, and the support shafts formed on both side walls constituting the cut space of the side plate are connected to the bottom plate. The bearing shaft is fitted into the bearing hole while being elastically deformed, and the inwardly saddle-shaped portion formed on one side of the side wall that forms the cut space formed in the side plate is connected to the surrounding wall of the bottom plate and the The bottom plate and the side plate are connected by passing a narrow gap with the protruding portion of the engaging portion, and when the side plate is in a horizontal state, the side plate has a bearing hole in the bottom plate. Since the support shaft is loosely fitted, the engagement between the side plate and the bottom plate is maintained, and when the side wall is in the upright flat state, the protruding portion of the engaging portion formed on the bottom plate and the side plate Engaging with the inward hook-shaped portion formed on the side plate Ri, Ru der those configured as engagement with the bottom plate and the side plate is maintained.

また、請求項２に記載の発明は、前記側板を起立させたとき、前記内向鉤状部の先端縁が、前記底板の上面に当接することで、前記側板の荷重が前記内向鉤状部を介して、前記底板に伝達されるようにしたものである。 The invention according to claim 2, when allowed to stand the side plates, distal edge of the inward hook-shaped portion, by contact with the upper surface of the bottom plate, the load of the side plates the inward hook portion through it, Ru Monodea was to be transmitted to the bottom plate.

また、請求項３に記載の発明は、前記底板の囲壁の内面に、抜止用の突条を、前記係合部の突出部分と相対するように形成したものである。 The invention according to claim 3, the inner surface of the surrounding wall of the bottom plate, a protrusion for retaining, Ru Monodea formed so as to face the protruding portions of the engaging portion.

また、請求項４に記載の発明は、上枠と該上枠に重ね合わされて折り畳み状態となる側板との連結構造において、前記上枠の外周には囲壁が垂下されているとともに、前記上枠には、前記囲壁から離間している突出部分を有する係合部と、軸受孔が開設された一対の垂下壁とが形成されており、また、前記側板の上辺縁には、前記上枠に形成された前記係合部に対応して、切込空間が形成されているとともに、該切込空間を構成する側壁の一側には、内向鉤状部が形成されており、更に、前記側板の上辺縁には、前記一対の垂下壁に対応して、切込空間が形成されているともに、該切込空間を構成する両側壁には、支軸が形成されており、前記上枠と前記側板とを連結する際には、水平状態の前記側板を、前記上枠に接近させて、前記側板の切込空間を構成する両側壁に形成された前記支軸を、前記上枠の軸受孔に、前記支軸を弾性変形させながら嵌入し、また、前記側板に形成された切込空間を構成する側壁の一側に形成された前記内向鉤状部を、前記上枠の囲壁と前記係合部の突出部分との狭小間隔を通過させることにより、前記上枠と前記側板とを連結するように構成されており、前記側板が水平状態においては、前記上枠の軸受孔に、前記側板の支軸が遊嵌されていることにより、前記側板と前記上枠との係合が維持され、また、前記側壁が起立平状態においては、前記上枠に形成された前記係合部の突出部分と前記側板に形成された前記内向鉤状部とが係合することにより、前記側板と前記上枠との係合が維持されるように構成したものである。 Further, the invention according to claim 4, in the coupling structure between the side plates to be folded superimposed on the upper frame and the upper frame, with being droop enclosure on the outer periphery of the upper frame, the upper frame Are formed with an engaging portion having a projecting portion spaced from the surrounding wall and a pair of hanging walls having bearing holes, and the upper edge of the side plate is connected to the upper frame. A cut space is formed corresponding to the formed engaging portion, and an inward saddle-shaped portion is formed on one side of the side wall constituting the cut space, and the side plate The upper edge is formed with a cut space corresponding to the pair of hanging walls, and both side walls constituting the cut space are formed with support shafts, When connecting the side plate, the side plate in a horizontal state is brought close to the upper frame, and the side plate The support shafts formed on both side walls constituting the insertion space are fitted into the bearing holes of the upper frame while elastically deforming the support shaft, and the side walls forming the cut space formed on the side plate The inward hook-shaped portion formed on one side is connected to the upper frame and the side plate by passing a narrow gap between the surrounding wall of the upper frame and the protruding portion of the engaging portion. When the side plate is in a horizontal state, the support of the side plate is loosely fitted in the bearing hole of the upper frame, so that the engagement between the side plate and the upper frame is maintained. When the side wall is in a standing flat state, the protruding portion of the engaging portion formed on the upper frame engages with the inwardly hooked portion formed on the side plate, whereby the side plate and the upper frame are engaged. der those configured such engagement is maintained of Ru.

また、請求項５に記載の発明は、前記上枠に水平壁を形成し、前記側板を起立させたときに、前記内向鉤状部の先端縁が、前記水平壁の下面に当接することで、前記上枠の荷重が、前記内向鉤状部を介して、前記側板に伝達されるように構成したものである。 The invention described in Claim 5, a horizontal wall formed in the upper frame, when the side plates is erected, that the leading edge of the inward hook-shaped portion comes into contact with the lower surface of the horizontal wall , load of the upper frame, via the inward hook-shaped portion, Ru der those configured to be transmitted to the side plate.

また、請求項６に記載の発明は、前記上枠の囲壁の内面に、抜止用の水平突条を、前記係合部の突出部分と相対するように形成したものである。 The invention of claim 6, the inner surface of the surrounding wall of the upper frame, the horizontal ridges for retaining, Ru Monodea formed so as to face the protruding portions of the engaging portion.

請求項１および請求項４に記載した発明では、プラスチックの射出成形金型による成形および製作が容易になるとともに、組立状態にて内面を平坦にでき、物が引っ掛かったり、嵌り込んだりすることがなくなるので、折り畳みコンテナの使い勝手が向上する。
請求項２および請求項５に記載した発明では、係合部に荷重が掛かることなく変形が防止される。 In the invention described in claim 1 and claim 4, it becomes easy to mold and manufacture with a plastic injection mold, and the inner surface can be flattened in an assembled state, and an object can be caught or fitted. Since it disappears, the usability of the folding container is improved.
In the invention described in claim 2 and claim 5, deformation is prevented without applying a load to the engaging portion.

次に本発明の実施例を図面に従い説明する。図１は本発明に係るプラスチック製の折り畳みコンテナの斜視図、図２はその折り畳み時の斜視図、図３は図１の折り畳みコンテナの中央縦断面図、図４は中央横断面図である。図中、１００は矩形状の底板、２００は矩形状の上枠、３００は上部板材３００ａと下部板材３００ｂとが「く」字状に屈折可能に連結された一対の長側板、４００は一対の短側板で、底板１００の相対する長辺に下部板材３００ｂを夫々内側に傾倒可能に枢着し、上枠２００の相対する長側辺に上部板材３００ａを夫々内側に傾倒可能に枢着し、上枠２００の相対する短側辺に短側板４００を夫々内側に傾倒可能に枢着してなり、該短側板４００を内側に傾倒させた後、該長側板３００を内側にく字状に屈折させることにより上枠２００が下降し、図２に示したように該上枠２００が底板１００上に重ね合わされて折り畳み状態となる。５００ａ，５００ｂは上枠２００の上面に観音開き式に開閉可能なるように枢着された一対のプラスチック製の蓋板である。 Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a plastic folding container according to the present invention, FIG. 2 is a perspective view at the time of folding, FIG. 3 is a central longitudinal sectional view of the folding container of FIG. 1, and FIG. In the figure, 100 is a rectangular bottom plate, 200 is a rectangular upper frame, 300 is a pair of long side plates in which an upper plate member 300a and a lower plate member 300b are refractorably connected in a "<" shape, and 400 is a pair of The lower plate 300b is pivotally attached to the opposite long sides of the bottom plate 100 so as to be tilted inward, and the upper plate 300a is pivotally attached to the opposite long sides of the upper frame 200 so as to be tilted inward. The short side plates 400 are pivotally attached to the opposite short sides of the upper frame 200 so as to be able to tilt inward, and after the short side plate 400 is tilted inward, the long side plate 300 is refracted in an inward shape. As a result, the upper frame 200 is lowered, and the upper frame 200 is overlaid on the bottom plate 100 as shown in FIG. Reference numerals 500a and 500b denote a pair of plastic lid plates pivotally attached to the upper surface of the upper frame 200 so as to be openable and closable.

底板１００は、図５に示したように、外周縁に囲壁１０１が起立状に一体成形されたもので、該底板１００の両長側辺に図６に矢印で示したように長側板３００（下部板材３００ｂ）を内側に約９０度回転自在なるように連結するための３タイプの連結構造ａ〜ｃが採られている。
連結構造ａは、請求項１〜３に記載した発明に係るもので、図７および図８に示すように、底板１００上面の囲壁１０１と交差する部位に上方膨部１０２を形成し、該上方膨部の一側に囲壁１０１から離間していて底板１００上面から垂直に起立し上端に囲壁１０１内面との間隔１０３を狭小とする突出部分１０４を有する係合部１０５を一体に形成する一方、長側板３００の下辺縁に前記上方膨部１０２および前記係合部１０５が位置し得る切込空間３０１を形成し、該切込空間の一側縁および上縁から連なり該切込空間内に突出するように内向鉤状部３０２を該側板３００の下辺縁に一体に形成している。そして、該内向鉤状部３０２を前記狭小間隔１０３を通過させ前記係合部１０５に係合し得るように構成している。そして長側板３００（下部板材３００ｂ）を起立させたとき該内向鉤状部３０２の先端縁が底板１００の上面に当接することで側板の荷重が該内向鉤状部を介して底板に伝達されるようにしている。なお、１０６は囲壁１０１の内面に係合部１０５の突出部分１０４と相対するように形成され、内向鉤状部３０２の抜止用となる水平突条である。この連結構造ａでは、突出部分１０４を図７に示されるようにｑ形に形成するとともに、該突出部分１０の外周に摺接する円弧状に内向鉤状部３０２を形成したことにより、曲面同士の摺接によりスムースな回転が可能となり、下部板材３００ｂを内側に約９０度傾倒し得る。 As shown in FIG. 5, the bottom plate 100 is formed by integrally forming a surrounding wall 101 upright on the outer peripheral edge, and on both long sides of the bottom plate 100, as shown by arrows in FIG. Three types of connection structures a to c for connecting the lower plate member 300b) so as to be rotatable about 90 degrees inside are adopted.
The connection structure a relates to the invention described in claims 1 to 3, and as shown in FIGS. 7 and 8, an upper bulging portion 102 is formed at a portion intersecting the surrounding wall 101 on the upper surface of the bottom plate 100, and On the one side of the bulging portion, an engagement portion 105 is integrally formed having a protruding portion 104 that is vertically spaced from the upper surface of the bottom plate 100 and that is vertically spaced from the upper surface of the bottom plate 100 and narrows the gap 103 with the inner surface of the surrounding wall 101 at the upper end. A notch space 301 in which the upper bulging portion 102 and the engaging portion 105 can be located is formed at the lower edge of the long side plate 300, and is continuous from one side edge and the upper edge of the notch space and protrudes into the notch space. Inwardly, the inwardly saddle-shaped portion 302 is formed integrally with the lower edge of the side plate 300. The inwardly saddle-like portion 302 is configured to pass through the narrow gap 103 and engage with the engaging portion 105. When the long side plate 300 (lower plate member 300b) is erected, the tip edge of the inward flange portion 302 abuts on the upper surface of the bottom plate 100, so that the load on the side plate is transmitted to the bottom plate through the inward flange portion. I am doing so. Reference numeral 106 denotes a horizontal ridge that is formed on the inner surface of the surrounding wall 101 so as to face the protruding portion 104 of the engaging portion 105 and serves to prevent the inward hook-like portion 302 from being removed. In this connection structure a, the projecting portion 104 is formed in a q shape as shown in FIG. 7, and the inward saddle-shaped portion 302 is formed in an arc shape that is in sliding contact with the outer periphery of the projecting portion 10. The sliding contact enables smooth rotation, and the lower plate member 300b can be tilted about 90 degrees inward.

また、連結構造ｂは、底板１００の両長側辺の中央部で該底板上面の囲壁１０１と交差する部位に方形状の上方膨部１１０を形成し、該上方膨部の両側壁に軸受孔１１１を開設する一方、下部板材３００ｂの下辺縁の中央部に前記上方膨部および前記係合部が位置し得る切込空間３１０を形成し、該切込空間の内壁に該切込空間内に突出するよう一対の支軸３１１を水平に形成し、該支軸３１１を弾性変形させることにより軸受孔１１１中に回転自在に遊嵌されるようにしたものである。 In addition, the connecting structure b is formed with a rectangular upper bulge portion 110 at a central portion of both long side edges of the bottom plate 100 at a portion intersecting the surrounding wall 101 on the upper surface of the bottom plate, and bearing holes on both side walls of the upper bulge portion. 111 is formed, and a notch space 310 in which the upper bulging portion and the engaging portion can be located is formed at the center of the lower edge of the lower plate member 300b, and the inner wall of the notch space is formed in the notch space. A pair of support shafts 311 are horizontally formed so as to protrude, and the support shafts 311 are elastically deformed so as to be freely loosely fitted in the bearing holes 111.

また、連結構造ｃは、底板１００の両長側辺の両端部寄りに夫々一対の軸受片１２０，１２１を適宜間隔を離して形成し、下部板材３００ｂの下辺縁の両端部寄りには軸受片１２０が位置し得る切込空間３２０を形成し、該切込空間内に突出するように軸受片３２１を形成し、該軸受片３２１を軸受片１２０，１２１間に一連に位置させて該底板１００の外側から樹脂製ピン３２２を挿入することにより回転自在に連結する構造である。 In addition, the connection structure c is formed with a pair of bearing pieces 120 and 121 at appropriate distances near both ends of both long sides of the bottom plate 100, and bearing pieces near both ends of the lower edge of the lower plate member 300b. A notch space 320 in which 120 can be located is formed, a bearing piece 321 is formed so as to protrude into the notch space, and the bearing piece 321 is positioned in series between the bearing pieces 120 and 121 to form the bottom plate 100. This is a structure in which a resin pin 322 is inserted from the outside to be rotatably connected.

次に上部板材３００ａと下部板材３００ｂとを内側にく字状に屈折可能なるように相対的に約１８０度回転可能に連結する構造を図９〜図１１に従い説明する。この連結構造には３タイプの連結構造ｄ〜ｆが採られている。連結構造ｄと連結構造ｅとは、同タイプであって、一方の上部板材３００ａの外側面の下端縁から少し内側に縦板状の軸支部３３０を突設し、該軸支部と一体に片持状支軸３３１を形成する一方、下部板材３００ｂの上端縁寄り一定幅を少なくとも相対する板材の厚さに相当する分だけ段状に外方に屈折させて内面溝３３２を形成し、該下部板材３００ｂの上端縁に一対の外方膨部３３３，３３４を前記軸支部３３０が位置し得る間隔を離して形成し、その一方の外方膨部３３３に前記片持状支軸３３１が遊嵌する切欠筒状の軸受部３３５を形成してなる。なお、軸支部３３０の外径は外方膨部３３３，３３４の外径と略同径に形成するとともに、該外方膨部の両端縁３３３’，３３４’は斜面状に面取りする。これによって外側面を滑らかにし出っ張りを少なくすることで衝突時の衝撃を緩和する。また、連結構造ｄの軸受部３３５は軸抜け防止のため図１０に示したように（いわゆるアンダーカットにより）先窄まり状に成形され、連結構造ｅの軸受部３３５は図１１に示したように横断面Ｕ字形に成形される。このように連結構造ｄと連結構造ｅとはこの軸受部３３５の構成が異なる。従って連結構造ｄでは、組み立て時に片持状支軸３３１を軸受部３３５に強圧することにより該軸受部３３５を弾性変形させ該片持状支軸３３１を軸受部３３５内に嵌入させる。このため連結構造ｄでは片持状支軸３３１が側方に抜け難い構造となり、コンテナ内の収容物から受ける圧力により該側板３００が外方に胴膨らみするのが防止される。また、図１０，図１１に示されるように、上部板材３００ａの下縁に形成された外方折曲リブが前記内面溝３３２に臨むことによりコンテナ内面の下部板材３００ｂとの境界が凹凸なく連なる。また、軸支部３３０が外方膨部３３３，３３４の間隔に挟まれることにより、軸方向への移動が妨げられ、ガタ付きがなくなる。
また、連結構造ｆは上記連結構造ｃと同様の構成であり、上部板材３００ａの下縁両端部に軸受片３３６，３３７を形成するとともに、下部板材３００ｂの上縁両端部に軸受片３３８を形成し、該各軸受片に樹脂製ピン３３９を挿入したものである。 Next, a structure in which the upper plate member 300a and the lower plate member 300b are connected so as to be relatively rotatable by about 180 degrees so that they can be refracted in an inward shape will be described with reference to FIGS. This connection structure employs three types of connection structures df. The connection structure d and the connection structure e are of the same type, and a vertical plate-shaped shaft support portion 330 protrudes slightly inward from the lower edge of the outer surface of one upper plate member 300a, and is integrally formed with the shaft support portion. While forming the support shaft 331, the inner plate 332 is formed by refracting outward a predetermined width near the upper edge of the lower plate member 300b at least by an amount corresponding to the thickness of the opposite plate member. A pair of outwardly expanded portions 333 and 334 are formed on the upper edge of the plate member 300b with a space where the shaft support portion 330 can be positioned, and the cantilevered support shaft 331 is loosely fitted to one of the outwardly expanded portions 333. A notched cylindrical bearing portion 335 is formed. The outer diameter of the shaft support portion 330 is formed to be substantially the same as the outer diameter of the outward expansion portions 333 and 334, and both end edges 333 ′ and 334 ′ of the outward expansion portion are chamfered in a slope shape. This reduces the impact during a collision by smoothing the outer surface and reducing the bulge. Further, the bearing portion 335 of the coupling structure d is formed in a tapered shape (by so-called undercut) as shown in FIG. 10 to prevent the shaft from coming off, and the bearing portion 335 of the coupling structure e is as shown in FIG. Is formed into a U-shaped cross section. Thus, the structure of this bearing part 335 differs between the connection structure d and the connection structure e. Therefore, in the connection structure d, the cantilevered support shaft 331 is strongly pressed against the bearing portion 335 at the time of assembly, whereby the bearing portion 335 is elastically deformed and the cantilevered support shaft 331 is fitted into the bearing portion 335. For this reason, in the connection structure d, the cantilevered support shaft 331 is difficult to be pulled out sideways, and the side plate 300 is prevented from bulging outward due to the pressure received from the contents in the container. 10 and 11, the outer bent rib formed on the lower edge of the upper plate member 300a faces the inner groove 332, so that the boundary between the container inner surface and the lower plate member 300b is continuous without unevenness. . Further, since the shaft support portion 330 is sandwiched between the outwardly expanded portions 333 and 334, movement in the axial direction is hindered, and there is no backlash.
The connection structure f has the same structure as the connection structure c, and the bearing pieces 336 and 337 are formed at both lower edge ends of the upper plate member 300a, and the bearing pieces 338 are formed at both upper edge ends of the lower plate member 300b. A resin pin 339 is inserted into each bearing piece.

そして、これらの連結構造ｄ〜ｆは、上部板材３００ａおよび下部板材３００ｂの外面側に形成され、上部板材３００ａと下部板材３００ｂとをともに起立させたとき、該下部板材３００ｂの内面溝３３２中に上部板材３００ａの下端縁が重合することから、コンテナ内面は平坦で隙間のないものとなる。
なお、上部板材３００ａおよび下部板材３００ｂの両端縁に外方に屈折することで内面が凹溝状となる補強用柱部３７０，３７１が一体に形成され、該補強用柱部の内側に内向鉤状係合片３７２，３７３が夫々一体に形成されている。 These connection structures d to f are formed on the outer surface side of the upper plate member 300a and the lower plate member 300b, and when the upper plate member 300a and the lower plate member 300b are erected together, in the inner surface groove 332 of the lower plate member 300b. Since the lower end edge of the upper plate 300a is superposed, the inner surface of the container is flat and has no gap.
Reinforcing column portions 370 and 371 whose inner surfaces are formed in a concave groove shape by being refracted outward at both end edges of the upper plate member 300a and the lower plate member 300b are integrally formed, and inwardly extending inside the reinforcing column portion. The respective engagement pieces 372 and 373 are integrally formed.

また、上枠２００は図４に示されたように外周に囲壁２０１が垂下状に一体成形されたもので、該囲壁２０１の内側に長側板３００（上部板材３００ａ）を内側に約９０度回転自在なるように連結するために上記と同様の３タイプの連結構造ａ〜ｃが採られている。即ち、連結構造ａは、図７に示されるように、囲壁２０１から離間した位置にて、上枠２００下縁から垂下し、下端に囲壁２０１内面との間隔２０３を狭小とする突出部分２０４を有する係合部２０５を一体に形成する一方、長側板３００の上辺縁に該係合部２０５が位置し得る切込空間３４０を形成し、該切込空間の一側縁および下縁から連なり該切込空間内に突出するように内向鉤状部３４１を該長側板の上辺縁に一体に形成している。また、図１２にも示したように、該上枠２００の囲壁２０１内に水平壁２０６を形成し、長側板３００（上部板材３００ａ）を起立させたとき該内向鉤状部３４１の先端縁が該水平壁の下面に当接することで上枠の荷重が該内向鉤状部３４１を介して該長側板に伝達されるようにしている。なお、３４３は囲壁２０１の内面に係合部２０５の突出部分２０４と相対するように形成され、内向鉤状部３４１の抜止用となる水平突条である。 Further, as shown in FIG. 4, the upper frame 200 is formed by integrally forming a surrounding wall 201 on the outer periphery in a hanging shape, and the long side plate 300 (upper plate member 300 a) is rotated about 90 degrees inside the surrounding wall 201. In order to connect freely, the same three types of connection structures a to c as described above are adopted. That is, as shown in FIG. 7, the connection structure a has a protruding portion 204 that hangs down from the lower edge of the upper frame 200 at a position separated from the surrounding wall 201 and narrows the distance 203 between the inner surface of the surrounding wall 201 and the lower end. The engaging portion 205 is integrally formed, and a notch space 340 in which the engaging portion 205 can be positioned is formed at the upper edge of the long side plate 300, and is connected from one side edge and the lower edge of the notch space. An inward flange portion 341 is integrally formed on the upper edge of the long side plate so as to protrude into the cut space. Also, as shown in FIG. 12, when the horizontal wall 206 is formed in the surrounding wall 201 of the upper frame 200 and the long side plate 300 (upper plate member 300a) is erected, the leading edge of the inward saddle-shaped portion 341 is By abutting against the lower surface of the horizontal wall, the load of the upper frame is transmitted to the long side plate via the inward flange portion 341. Reference numeral 343 denotes a horizontal ridge that is formed on the inner surface of the surrounding wall 201 so as to face the protruding portion 204 of the engaging portion 205 and serves to prevent the inward flange portion 341 from being removed.

また、連結構造ｂは、上枠２００の両長側辺の中央部で囲壁２０１の内側に垂下壁２０９を形成し、該垂下壁に軸受孔２１０を開設する一方、上部板材３００ａの上辺縁の中央部に切込空間３５０を形成し、該切込空間の内壁に該切込空間内に突出するよう一対の支軸３５１を水平に形成し、該支軸３５１を弾性変形させることにより軸受孔２１０中に回転自在に遊嵌されるようにしたものである。なお、該上枠２００の囲壁２０１内に水平壁２１１を形成し、該水平壁２１１を介して上枠の荷重が長側板に伝達されることから支軸３５１への負荷が軽減されるようにしている。 In addition, the connecting structure b forms a hanging wall 209 inside the surrounding wall 201 at the center of both long side edges of the upper frame 200, and opens a bearing hole 210 in the hanging wall, while the upper edge of the upper plate member 300a is A notch space 350 is formed in the center, a pair of support shafts 351 are horizontally formed on the inner wall of the notch space so as to protrude into the notch space, and the support shafts 351 are elastically deformed to thereby form bearing holes. 210 is freely loosely fitted in 210. A horizontal wall 211 is formed in the surrounding wall 201 of the upper frame 200, and the load on the support shaft 351 is reduced because the load of the upper frame is transmitted to the long side plate via the horizontal wall 211. ing.

また、連結構造ｃは、上枠２００の両長側辺の両端部寄りに夫々一対の軸受片２２０，２２１を適宜間隔を離して形成し、上部板材３００ａの上辺縁の両端部寄りに軸受片２２０が位置し得る切込空間３６０を形成し、該切込空間内に突出するように軸受片３６１を形成し、該軸受片３６１を軸受片２２０，２２１間に一連に位置させて該上枠２００の外側から樹脂製ピン３６２を挿入することにより回転自在に連結する構造である。なお、２３０は上枠２００の短辺の外側面に形成された手掛用窪である。 Further, the connection structure c is formed with a pair of bearing pieces 220 and 221 that are appropriately spaced apart from both ends of both long sides of the upper frame 200, and bearing pieces that are close to both ends of the upper edge of the upper plate member 300a. A notch space 360 in which 220 can be located is formed, a bearing piece 361 is formed so as to protrude into the notch space, and the bearing piece 361 is positioned in series between the bearing pieces 220 and 221 so that the upper frame In this structure, resin pins 362 are inserted from the outside of 200 to be freely connected. Reference numeral 230 denotes a handhold recess formed on the outer side of the short side of the upper frame 200.

また、短側板４００は上枠２００の相対する短側辺に上記と同様の３タイプの連結構造ａ〜ｃにより夫々内側に約９０度傾倒可能に枢着されているので、この連結構造については同一部分に同一符号を付すことでその説明を省略する。なお、短側板４００はその枢着位置を上部板材３００ａおよび下部板材３００ｂの前記補強用柱部３７０，３７１の真上に設定することにより、図３に示されるように該短側板４００を起立させたとき、該補強用柱部３７０，３７１が該短側板の両側端面によって隠されるようにしている。そして、該短側板４００の外周縁表面側に形成された補強用リブ４０１に前記内向鉤状係合片３７２，３７３が係合し得るようにしている。なお、短側板４００の表面側には上記補強用リブ４０１が形成されている他、その内側に２重枠状に補強用リブ４０２が形成されている。 Further, the short side plate 400 is pivotally attached to the opposite short sides of the upper frame 200 by three types of connection structures a to c similar to the above so as to be tiltable about 90 degrees inwardly. The description is abbreviate | omitted by attaching | subjecting the same code | symbol to the same part. Note that the short side plate 400 is set up right above the reinforcing column portions 370 and 371 of the upper plate member 300a and the lower plate member 300b so that the short side plate 400 is raised as shown in FIG. In this case, the reinforcing column portions 370 and 371 are concealed by both end surfaces of the short side plate. The inward hook-like engagement pieces 372 and 373 can be engaged with the reinforcing rib 401 formed on the outer peripheral surface side of the short side plate 400. The reinforcing rib 401 is formed on the surface side of the short side plate 400, and the reinforcing rib 402 is formed in a double frame shape inside the rib.

次に、短側板４００を起立状態にて底板１００に係合させるための第１及び第２の係合機構を図１３〜図１６に従い説明する。
第１の係合機構は、底板１００の短辺の中央部上面に起立台１３０を一体に形成し、該起立台の上部両側から水平方向に延びる庇部１３１を形成するとともに、短側板４００の下縁部中央に該短側板を起立させたとき該庇部の下側に介入し得る係合部４０３を形成してなる。このように係合部４０３が庇部の下側に介入し係合することにより、底板１００に内容物の重みが継続的に掛かっても該底板１００が下方に湾曲し過大に変形するのが防がれる。 Next, first and second engagement mechanisms for engaging the short side plate 400 with the bottom plate 100 in an upright state will be described with reference to FIGS.
The first engagement mechanism integrally forms a stand 130 on the upper surface of the central portion of the short side of the bottom plate 100, forms a flange 131 that extends horizontally from both sides of the top of the stand, and An engaging portion 403 that can intervene under the flange when the short side plate is erected at the center of the lower edge is formed. In this way, when the engaging portion 403 intervenes and engages below the collar portion, even if the weight of the contents is continuously applied to the bottom plate 100, the bottom plate 100 is bent downward and excessively deformed. It is prevented.

また、第２の係合機構は、起立台１３０の両側に少し間隔を置き該底板１００の短辺と直交する方向に延びる起立片１３２を一体に形成し、該起立片の側面に係合爪１３３を突設するとともに、短側板４００の下縁部の前記補強用リブ４０１を切除し、垂下片４０４を前記起立片１３２と平行に形成し、該垂下片に前記係合爪１３３と係合し得る爪片４０５を一体に形成してなる。このように起立片１３２と垂下片４０４とを係合させることにより底板１００が下方に多少湾曲変形しても係合爪１３３と爪片４０５との係合状態を保持できる。言い換えれば多少の変形によって係合不能となるようなことがなく、常に一定した係合状態が維持される。このため、過酷な使用によっても短側板４００の起立保持が不能になったり、折り畳みが不能になるようなことがない。 Further, the second engagement mechanism is integrally formed with upright pieces 132 that extend in a direction perpendicular to the short side of the bottom plate 100 with a little space on both sides of the upright stand 130, and an engaging claw on the side surface of the upright piece. 133, and the reinforcing rib 401 at the lower edge of the short side plate 400 is cut away to form a hanging piece 404 parallel to the upright piece 132. The hanging piece is engaged with the engaging claw 133. The nail | claw piece 405 which can be formed is formed integrally. By engaging the standing piece 132 and the hanging piece 404 in this way, the engagement state between the engagement claw 133 and the claw piece 405 can be maintained even if the bottom plate 100 is slightly curved downward. In other words, there is no possibility of disengagement due to some deformation, and a constant engagement state is always maintained. For this reason, even if it is severely used, the short side plate 400 cannot be held upright and cannot be folded.

また、蓋板５００ａ，５００ｂは上面中央部５１０を浅凹窪状に形成しラベル等が貼付られるように細かい凹凸状に形成するとともに、両側縁部に該各蓋板を構成する板材を上方に部分的に湾曲した形態に形成することにより、コンテナ側面に開口する把手孔５１１と上方に突出する積載時ズレ止用の突起５１２とが兼ねられるようにしている。なお、蓋板５００ａ，５００ｂの相対する先端縁には互いに係合し得るように上向片５１３ａと下向片５１３ｂが形成されている。そして、上枠２００の長側辺の上面に形成された窪部２３１に連結片５１４の一辺を枢着し、蓋板５００ａ，５００ｂの基端縁に形成された窪部５１５に該連結片５１４の他辺を枢着することにより、該蓋板５００ａ，５００ｂが外側に大きく観音開きできるようにしている。 In addition, the cover plates 500a and 500b are formed in a concave and convex shape so that the upper surface central portion 510 is formed in a shallow concave shape so that a label or the like can be attached, and the plate members constituting the cover plates are placed upward on both side edges. By forming it in a partially curved form, the handle hole 511 that opens to the side surface of the container and the protrusion 512 for preventing misalignment during loading that protrude upward are used as well. In addition, an upward piece 513a and a downward piece 513b are formed at opposite tip edges of the cover plates 500a and 500b so as to be able to engage with each other. Then, one side of the connection piece 514 is pivotally attached to the recess 231 formed on the upper surface of the long side of the upper frame 200, and the connection piece 514 is connected to the recess 515 formed at the base edge of the cover plates 500a and 500b. By pivotally attaching the other side, the lid plates 500a and 500b can be widened outwardly.

なおこの実施例では、底板と長側板との連結、上枠と長側板との連結、および上枠と短側板との連結手段としていずれも連結構造ａ〜ｃを採用したが、連結構造ａのみにより底板と長側板とを連結することも、上枠と長側板とを連結することも、上枠と短側板とを連結することも可能である。そして、本発明に係る連結構造によれば、係合部は底板上面から起立状または上枠から垂下状に一体に形成するものであり、内向鉤状部は側板に一体に形成されるものであるので、従来の連結軸の軸状形態であるよりも強度があり、大荷重，長時間荷重に対して撓み変形し難い利点があるとともに、プラスチック成形時に抜き型が容易であり、しかもコンテナ内に凹部や隙間等が生じることなく、内面を平坦に保つことができる。このため使い勝手が向上する。 In this embodiment, the connection structures a to c are used as the connection means between the bottom plate and the long side plate, the connection between the top frame and the long side plate, and the connection method between the top frame and the short side plate, but only the connection structure a. It is possible to connect the bottom plate and the long side plate, the upper frame and the long side plate, or the upper frame and the short side plate. According to the connection structure of the present invention, the engaging portion is integrally formed upright from the top surface of the bottom plate or suspended from the top frame, and the inwardly hooked portion is formed integrally with the side plate. Therefore, it is stronger than the conventional shaft shape of the connecting shaft, and has the advantage that it is difficult to bend and deform under heavy loads and long-term loads, and it can be easily punched during plastic molding, and it can be used in the container. Therefore, the inner surface can be kept flat without any recesses or gaps. For this reason, usability is improved.

また、側板を起立させたとき内向鉤状部を介して荷重が底板や上枠に伝達されるようにしたことから、係合部の負荷が軽減され、変形，破損のおそれの少ない耐久性のある折り畳みコンテナを提供することができる。 In addition, when the side plate is erected, the load is transmitted to the bottom plate and the upper frame through the inwardly saddle-like portion, so that the load on the engaging portion is reduced, and there is little risk of deformation or damage. A folding container can be provided.

この実施例は、上部板材と下部板材とを内側にく字状に屈折可能に連結した長側板を備える折り畳みコンテナについて説明したが、矩形状の底板の各辺に側板を内側に傾倒可能に設けてなるその他の形態の折り畳みコンテナにおける側板等の連結部にも本発明の連結構造を適用することができ、上記のような種々の利点をもたらし得る。 In this embodiment, a folding container having a long side plate in which an upper plate member and a lower plate member are connected in a refraction-like manner inwardly is described, but a side plate is provided on each side of a rectangular bottom plate so as to be tiltable inward. The connecting structure of the present invention can also be applied to connecting parts such as side plates in other types of folding containers, which can provide various advantages as described above.

本発明の実施例を示す折り畳みコンテナの斜視図。The perspective view of the folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの折り畳み時の斜視図。The perspective view at the time of folding of the folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの中央縦断面図。The center longitudinal cross-sectional view of the folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの中央横断面図。The center cross-sectional view of the folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの底板の斜視図。The perspective view of the baseplate of the folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの底板と長側板を内側から見た斜視図。The perspective view which looked at the bottom plate and long side plate of the folding container which show the Example of this invention from the inner side. 図３のＡ−Ａ線断面矢視図。FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. 本発明の実施例を示す折り畳みコンテナの底板と長側板との連結部の分解斜視図。The disassembled perspective view of the connection part of the baseplate and long side board of a folding container which shows the Example of this invention. 本発明の実施例を示す折り畳みコンテナの長側板の分解斜視図。The disassembled perspective view of the long side board of the folding container which shows the Example of this invention. 図１のＢ−Ｂ線断面拡大図。FIG. 3 is an enlarged cross-sectional view taken along line BB in FIG. 1. 図１のＣ−Ｃ線断面拡大図。The CC sectional view enlarged view of FIG. 図４のＤ−Ｄ線断面図。The DD sectional view taken on the line of FIG. 図４のＥ−Ｅ線断面図。EE sectional view taken on the line of FIG. 図１３のＦ−Ｆ線断面図。FF sectional view taken on the line of FIG. 図１４のＧ−Ｇ線断面図。The GG sectional view taken on the line of FIG. 図１３に示す折り畳みコンテナの短側板の折り畳み作動状態図。The folding operation state figure of the short side board of the folding container shown in FIG.

符号の説明Explanation of symbols

１００底板
１０１囲壁
１０２上方膨部
１０３間隔
１０４突出部分
１０５係合部
１０６水平突条
２００上枠
２０１囲壁
２０３間隔
２０４突出部分
２０５係合部
２０６水平壁
３００長側板
３００ａ上部板材
３００ｂ下部板材
３０１切込空間
３０２内向鉤状部
３４０切込空間
３４１内向鉤状部
３４３水平突条
４００短側板
５００ａ，５００ｂ蓋板

DESCRIPTION OF SYMBOLS 100 Bottom plate 101 Enclosure wall 102 Upper expansion part 103 Space | interval 104 Protrusion part 105 Engagement part 106 Horizontal protrusion 200 Upper frame 201 Enclosure wall 203 Space | interval 204 Protrusion part 205 Engagement part 206 Horizontal wall 300 Long side board 300a Upper board material 300b Lower board material 301 Notch Space 302 Inward ridge portion 340 Cut space 341 Inward ridge portion 343 Horizontal ridge 400 Short side plate 500a, 500b Cover plate

Claims

底板と該底板に重ね合わされて折り畳み状態となる側板との連結構造において、前記底板の外周縁に形成された囲壁には、上方膨部と該上方膨部の一側に形成されているとともに前記囲壁から離間している突出部分とからなる係合部と、両側壁に軸受孔が開設された前記上方膨部とは別の上方膨部が形成されており、また、前記側板の下辺縁には、前記底板に形成された前記係合部に対応して、切込空間が形成されているとともに、該切込空間を構成する側壁の一側には、内向鉤状部が形成されており、更に、前記側板の下辺縁には、前記底板に形成された別の上方膨部に対応して、切込空間が形成されているとともに、該切込空間を構成する両側壁には、支軸が形成されており、前記底板と前記側板とを連結する際には、水平状態の前記側板を、前記底板に接近させて、前記側板の切込空間を構成する両側壁に形成された前記支軸を、前記底板の軸受孔に、前記支軸を弾性変形させながら嵌入し、また、前記側板に形成された切込空間を構成する側壁の一側に形成された前記内向鉤状部を、前記底板の囲壁と前記係合部の突出部分との狭小間隔を通過させることにより、前記底板と前記側板とを連結するように構成されており、前記側板が水平状態においては、前記底板の軸受孔に、前記側板の支軸が遊嵌されていることにより、前記側板と前記底板との係合が維持され、また、前記側壁が起立平状態においては、前記底板に形成された前記係合部の突出部分と前記側板に形成された前記内向鉤状部とが係合することにより、前記側板と前記底板との係合が維持されるように構成されていることを特徴とする折り畳みコンテナにおける側板の連結構造。 In the connection structure of the bottom plate and the side plate that is overlapped with the bottom plate and is in a folded state, the surrounding wall formed on the outer peripheral edge of the bottom plate is formed on one side of the upper bulge and the upper bulge. An engaging portion composed of a protruding portion spaced apart from the surrounding wall, and an upper bulging portion different from the upper bulging portion having bearing holes formed on both side walls are formed, and at the lower edge of the side plate Corresponds to the engaging portion formed in the bottom plate, and a notch space is formed, and an inward saddle-like portion is formed on one side of the side wall constituting the notch space. Further, the lower edge of the side plate is formed with a cut space corresponding to another upper bulge portion formed in the bottom plate, and both side walls constituting the cut space are supported on both side walls. A shaft is formed, and when connecting the bottom plate and the side plate, the side in the horizontal state Is inserted into the bearing hole of the bottom plate while elastically deforming the support shaft, and the support shaft formed on both side walls constituting the cut space of the side plate. The bottom plate is made to pass through a narrow gap between the surrounding wall of the bottom plate and the projecting portion of the engaging portion through the inwardly saddle-like portion formed on one side of the side wall constituting the cut space formed in the side plate. And the side plate, and when the side plate is in a horizontal state, the support plate of the side plate is loosely fitted in the bearing hole of the bottom plate, so that the side plate and the side plate are connected to each other. When the engagement is maintained and the side wall is in the standing flat state, the protruding portion of the engagement portion formed on the bottom plate and the inwardly hooked portion formed on the side plate are engaged, The engagement between the side plate and the bottom plate is maintained. Coupling structure of side plates in the collapsed container, characterized in that it is.

前記側板を起立させたとき、前記内向鉤状部の先端縁が、前記底板の上面に当接することで、前記側板の荷重が前記内向鉤状部を介して、前記底板に伝達されるようにしたことを特徴とする請求項１に記載の折り畳みコンテナにおける側板の連結構造。 When allowed to stand the side plates, so that the tip edge of the inward hook-shaped portion, by contact with the upper surface of the bottom plate, the load of the side plate via the inward hook-shaped portion, is transmitted to the bottom plate The connecting structure of the side plates in the folding container according to claim 1.

前記底板の囲壁の内面に、抜止用の突条を、前記係合部の突出部分と相対するように形成したことを特徴とする請求項１又は請求項２に記載の折り畳みコンテナにおける側板の連結構造。 The inner surface of the surrounding wall of the bottom plate, a protrusion for retaining the coupling of the side plate in the collapsed container according to claim 1 or claim 2, characterized in that formed so as to overhang relative to the engagement portion Construction.

上枠と該上枠に重ね合わされて折り畳み状態となる側板との連結構造において、前記上枠の外周には囲壁が垂下されているとともに、前記上枠には、前記囲壁から離間している突出部分を有する係合部と、軸受孔が開設された一対の垂下壁とが形成されており、また、前記側板の上辺縁には、前記上枠に形成された前記係合部に対応して、切込空間が形成されているとともに、該切込空間を構成する側壁の一側には、内向鉤状部が形成されており、更に、前記側板の上辺縁には、前記一対の垂下壁に対応して、切込空間が形成されているともに、該切込空間を構成する両側壁には、支軸が形成されており、前記上枠と前記側板とを連結する際には、水平状態の前記側板を、前記上枠に接近させて、前記側板の切込空間を構成する両側壁に形成された前記支軸を、前記上枠の軸受孔に、前記支軸を弾性変形させながら嵌入し、また、前記側板に形成された切込空間を構成する側壁の一側に形成された前記内向鉤状部を、前記上枠の囲壁と前記係合部の突出部分との狭小間隔を通過させることにより、前記上枠と前記側板とを連結するように構成されており、前記側板が水平状態においては、前記上枠の軸受孔に、前記側板の支軸が遊嵌されていることにより、前記側板と前記上枠との係合が維持され、また、前記側壁が起立平状態においては、前記上枠に形成された前記係合部の突出部分と前記側板に形成された前記内向鉤状部とが係合することにより、前記側板と前記上枠との係合が維持されるように構成されていることを特徴とする折り畳みコンテナにおける側板の連結構造。 In the connection structure between the upper frame and the side plate that is overlapped with the upper frame and is in a folded state, a surrounding wall is suspended from the outer periphery of the upper frame, and the upper frame protrudes away from the surrounding wall. An engaging portion having a portion and a pair of hanging walls having bearing holes are formed, and an upper edge of the side plate corresponds to the engaging portion formed on the upper frame. In addition, an incision space is formed, an inwardly hooked portion is formed on one side of the side wall constituting the incision space, and the pair of hanging walls is formed on the upper edge of the side plate Is formed with a support shaft on both side walls constituting the cut space, and when connecting the upper frame and the side plate, The side plate in a state is made close to the upper frame and formed on both side walls constituting the cut space of the side plate The support shaft is inserted into the bearing hole of the upper frame while elastically deforming the support shaft, and the inward formed on one side of a side wall that forms a cut space formed in the side plate. The hook-shaped portion is configured to connect the upper frame and the side plate by passing a narrow gap between the surrounding wall of the upper frame and the protruding portion of the engaging portion, and the side plate is in a horizontal state. In the bearing hole of the upper frame, the support shaft of the side plate is loosely fitted, so that the engagement between the side plate and the upper frame is maintained, and the side wall is in the standing flat state, Engagement between the protruding portion of the engaging portion formed on the upper frame and the inwardly hooked portion formed on the side plate maintains the engagement between the side plate and the upper frame. A structure for connecting side plates in a folding container, characterized in that it is configured .

前記上枠に水平壁を形成し、前記側板を起立させたときに、前記内向鉤状部の先端縁が、前記水平壁の下面に当接することで、前記上枠の荷重が、前記内向鉤状部を介して、前記側板に伝達されるようにしたことを特徴とする請求項４に記載の折り畳みコンテナにおける側板の連結構造。 The horizontal walls formed in the upper frame, when the side plates is erected, the distal edge of the inward hook-shaped portion, that contacts the lower surface of the horizontal wall, the load of the upper frame, the inward hook The structure for connecting side plates in a folding container according to claim 4 , wherein the side plates are transmitted to the side plates via a shape portion.

前記上枠の囲壁の内面に、抜止用の水平突条を、前記係合部の突出部分と相対するように形成したことを特徴とする請求項４又は請求項５に記載の折り畳みコンテナにおける側板の連結構造。 The inner surface of the surrounding wall of the upper frame, the side plates and horizontal ridges for retaining, in the collapsed container according to claim 4 or claim 5, characterized in that formed so as to overhang relative to the engagement portion Connection structure.